aut. — auto

Amer. — American

API— American Pertroleum Institute BFZ — bottomhole formation zone BOP — blowout preventer

Brit. — British

BTU — British thermal unit

cartog. — cartographic

1. — confer

chem. — chemical

coll. — colloquialism

comp. — computer science DMS — drilling mud surfactant ec. — economics

eff. — efficiency

1. — exempli


2. — electrotechnics gratia; for example

geod. — geodesy, geodetic geol. — geologic geophys. — геофизика hydr. — hydraulic

min. — mining; minerology math. — mathematics OBM — oil base mud

off. — offshore

OMDU — offshore mobile drilling unit

opt. — optics

photo — photography

1. — plural

prof. — professional rad. — radiotechnics rail. — railway

RLT — reservoir limit test

1. — see

seis. — seismic top. — topographic tr. — trade name tub— tubing

WBM — water-base mud

1. wd. — weld

WOC — waiting on cement